🍏 Thread 8: -[UIImagePickerController init] must be used from main thread only

Bug

Having an issue with iOS and initializing the react-native-image-picker. On init. the module lags for ~5 sec. before the camera is launched.

Debug output in XCode:

=================================================================
Main Thread Checker: UI API called on a background thread: -[UIImagePickerController init]
PID: 9819, TID: 2519723, Thread name: (none), Queue name: com.facebook.react.ImagePickerManagerQueue, QoS: 0
Backtrace:
4   caudex                              0x00000001017b0e58 -[ImagePickerManager launchImagePicker:] + 96
5   caudex                              0x00000001017b0de0 -[ImagePickerManager launchImagePicker:options:] + 116
6   caudex                              0x00000001017af27c -[ImagePickerManager launchImageLibrary:callback:] + 140
7   CoreFoundation                      0x00000001b39b4c20 7519E999-1053-3367-B9D5-8844F6D3BDC6 + 1252384
8   CoreFoundation                      0x00000001b3884d30 7519E999-1053-3367-B9D5-8844F6D3BDC6 + 7472
9   CoreFoundation                      0x00000001b3885908 7519E999-1053-3367-B9D5-8844F6D3BDC6 + 10504
10  caudex                              0x0000000101291ed0 -[RCTModuleMethod invokeWithBridge:module:arguments:] + 1896
11  caudex                              0x00000001012958cc _ZN8facebook5reactL11invokeInnerEP9RCTBridgeP13RCTModuleDatajRKN5folly7dynamicE + 660
12  caudex                              0x0000000101295440 _ZZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEiENK3$_0clEv + 144
13  caudex                              0x00000001012953a4 ___ZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEi_block_invoke + 28
14  libdispatch.dylib                   0x0000000104cf97fc _dispatch_call_block_and_release + 24
15  libdispatch.dylib                   0x0000000104cfabd8 _dispatch_client_callout + 16
16  libdispatch.dylib                   0x0000000104d01b48 _dispatch_lane_serial_drain + 744
17  libdispatch.dylib                   0x0000000104d026e4 _dispatch_lane_invoke + 448
18  libdispatch.dylib                   0x0000000104d0dadc _dispatch_workloop_worker_thread + 1324
19  libsystem_pthread.dylib             0x00000001b36cab88 _pthread_wqthread + 276
20  libsystem_pthread.dylib             0x00000001b36cd760 start_wqthread + 8
2020-02-24 08:24:12.923320+0100 caudex[9819:2519723] [reports] Main Thread Checker: UI API called on a background thread: -[UIImagePickerController init]
PID: 9819, TID: 2519723, Thread name: (none), Queue name: com.facebook.react.ImagePickerManagerQueue, QoS: 0
Backtrace:
4   caudex                              0x00000001017b0e58 -[ImagePickerManager launchImagePicker:] + 96
5   caudex                              0x00000001017b0de0 -[ImagePickerManager launchImagePicker:options:] + 116
6   caudex                              0x00000001017af27c -[ImagePickerManager launchImageLibrary:callback:] + 140
7   CoreFoundation                      0x00000001b39b4c20 7519E999-1053-3367-B9D5-8844F6D3BDC6 + 1252384
8   CoreFoundation                      0x00000001b3884d30 7519E999-1053-3367-B9D5-8844F6D3BDC6 + 7472
9   CoreFoundation                      0x00000001b3885908 7519E999-1053-3367-B9D5-8844F6D3BDC6 + 10504
10  caudex                              0x0000000101291ed0 -[RCTModuleMethod invokeWithBridge:module:arguments:] + 1896
11  caudex                              0x00000001012958cc _ZN8facebook5reactL11invokeInnerEP9RCTBridgeP13RCTModuleDatajRKN5folly7dynamicE + 660
12  caudex                              0x0000000101295440 _ZZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEiENK3$_0clEv + 144
13  caudex                              0x00000001012953a4 ___ZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEi_block_invoke + 28
14  libdispatch.dylib                   0x0000000104cf97fc _dispatch_call_block_and_release + 24
15  libdispatch.dylib                   0x0000000104cfabd8 _dispatch_client_callout + 16
16  libdispatch.dylib                   0x0000000104d01b48 _dispatch_lane_serial_drain + 744
17  libdispatch.dylib                   0x0000000104d026e4 _dispatch_lane_invoke + 448
18  libdispatch.dylib                   0x0000000104d0dadc _dispatch_workloop_worker_thread + 1324
19  libsystem_pthread.dylib             0x00000001b36cab88 _pthread_wqthread + 276
20  libsystem_pthread.dylib             0x00000001b36cd760 start_wqthread + 8

Environment info

React native info output:

System:
    OS: macOS 10.15.3
    CPU: (12) x64 Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
    Memory: 120.71 MB / 16.00 GB
    Shell: 5.7.1 - /bin/zsh
  Binaries:
    Node: 11.10.1 - ~/.nvm/versions/node/v11.10.1/bin/node
    Yarn: 1.22.0 - /usr/local/bin/yarn
    npm: 6.7.0 - ~/.nvm/versions/node/v11.10.1/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  SDKs:
    iOS SDK:
      Platforms: iOS 13.2, DriverKit 19.0, macOS 10.15, tvOS 13.2, watchOS 6.1
  IDEs:
    Android Studio: 3.5 AI-191.8026.42.35.6010548
    Xcode: 11.3.1/11C504 - /usr/bin/xcodebuild
  npmPackages:
    react: 16.9.0 => 16.9.0 
    react-native: 0.61.5 => 0.61.5

Library version: 2.3.0

Steps To Reproduce

This is how I launch it:

   ImagePicker.launchImageLibrary(options, (response) => {
    ...
    });

I used the the built-in-functionality Main Thread Checker

Describe what you expected to happen:

1. Expect the module to be launched immediately

[xclidongbo]

Please change it like this:

- (void)launchImagePicker:(RNImagePickerTarget)target options:(NSDictionary *)options
{
    self.options = options;
    dispatch_async(dispatch_get_main_queue(), ^(void) {
       [self launchImagePicker:target];
    });
}

[stale[bot]]

Closing this issue after a prolonged period of inactivity. Fell free to reopen this issue, if this still affecting you.